Abstract: In one aspect, a computer-implemented method of receiving information corresponding to a designed product and determining initial price(s) as well as initial values of other business variables associated with the price. The method allows a user to enter a change to a price or the other business variable to instantly discover how the change affects other variables and optionally how the change affects one or more allowable ranges of acceptable values of other variables. The user can then lock the value of one or more of the variables and prices and change others to instantly discover how a change to one affects the others and optionally how a change to one affects one or more allowable ranges of acceptable values of the others while any locked values remain unchanged. The user can then order manufacture of the designed product as a function of values of price and other business variables.